What is the difference between an indigenous natural community and a temporary one?

The natural community is obviously a biocenosis, and the temporary one is an agrocenosis. The latter is artificially created and maintained by man, and therefore:
– has an open circulation of substances and short food chains;
-consists of a small number of species, most often represented by a monoculture;
-exists only in the presence of additional energy sources;
– weakly capable of self-regulation and, as a result, unstable and short-lived.